<html>
  <head>
    <script type="module" src="./my-element.js"></script>
    <title>lit-element code sample</title>
    <style>
      html {
        --theme-primary: green;
        --theme-secondary: aliceblue;
        --theme-warning: red;
        --theme-font-family: Roboto;
      }
      my-element { 
        --my-element-text-color: var(--theme-primary); 
        --my-element-background-color: var(--theme-secondary); 
        --my-element-font-family: var(--theme-font-family);
      } 
      .warning {
        --my-element-text-color: var(--theme-warning); 
      }
    </style>
  </head>
  <body>
    <my-element></my-element>
    <my-element class="warning"></my-element>
  </body>
</html>
